A tree cannot grow in the sky, nor clouds be in the deep sea, nor fish live in the fields, nor can blood be in sticks nor sap in rocks.

Denique in aethere non arbor, non aequore in alto
nubes esse queunt nec pisces vivere in arvis
nec cruor in lignis neque saxis sucus inesse.

More information about this quote

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Original Citation

Carus, Titus Lucretius. De Rerum Natura [On the Nature of Things]. c. 55 BC, bk. 3, l. 784.

Current Citation

Carus, Titus Lucretius. The Nature of Things, translated by Alicia Stallings. Penguin Classics, 2007, bk. 3, l. 784.